objc_macro

#define RGB(r, g, b) [UIColor colorWithRed:(r)/255.0 green:(g)/255.0 blue:(b)/255.0 alpha:1]
#define RGBA(r, g, b, a)    [UIColor colorWithRed:(r)/255.0 green:(g)/255.0 blue:(b)/255.0 alpha:(a)]

#define IS_IPHONE (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)
#define IS_IPAD (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
#define IS_RETINA [[UIScreen mainScreen] scale] > 1.0

#define LANGUAGE    ([NSLocale preferredLanguages][0])

#define SCREEN_BOUNDS   ([UIScreen mainScreen].bounds)

#ifdef DEBUG
#   define LOG_CURRENT_LINE(fmt, ...) NSLog((@"%s [Line %d] " fmt), __PRETTY_FUNCTION__, __LINE__, ##__VA_ARGS__);
#else
#   define LOG_CURRENT_LINE(...)
#endif